/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package xds

import (
	"regexp"
)

var illegalChars = regexp.MustCompile(`[^a-zA-Z_\-0-9]`)

// We need to sanitize metrics in order to  not break statsd and prometheus format.
// StatsD only allow [a-zA-Z_\-0-9.] characters, everything else is removed
// Extra dots breaks many regexes that converts statsd metric to prometheus one with tags
func SanitizeMetric(metric string) string {
	return illegalChars.ReplaceAllString(metric, "_")
}
